Whistler PRO3750 User manual

PRO3750
User Guide
PRO3750
MAXIMUM
PERFORMANCE
Laser/Radar Detector

2
INTRODUCTION
Dear Whistler Customer,
If you have questions concerning the operation of this Whistler
product please call:
Customer Service
1-800-531-0004
Monday - Friday • 8:00 am - 5:00 pm CT
or visit our website
www.whistlergroup.com
Please keep the receipt in a safe place. You may register your
product online at www.whistlergroup.com. For warranty
verification purposes, a copy of your dated store receipt must
still accompany any unit sent in for warranty work. If the unit is
returned without a dated store receipt, an out-of-warranty service
charge applies.
NOTE: Your warranty period begins at the time of purchase. The
warranty is validated only by the dated store receipt! Please
record the serial number of the unit in the space provided in the
accessories section of the guide.
To fully acquaint yourself with the operation of your Whistler
detector and to better understand the differences between
detecting radar, laser, and safety radar signals, we recommend
reading this entire guide or visiting our FAQ page on our website
www.whistlergroup.com.
Enjoy your Whistler detector and please drive safely.
Sincerely,
The Whistler Group, Inc.

3
TABLE OF CONTENTS
Model Features Summary ........................................ 5 - 6
Operation .................................................................. 7 - 25
• Power On and Self-Test
• Memory/Beep Confirmation
• Audio Level Adjustment
• Auto Quiet/Quiet Modes
• City/City 1/City 2 Modes
• Highway Mode
• Selectable Signal Strength Meter
• Understanding the Display
• Temperature Display
• Dim/Dark Modes
• Horizontal/Vertical Viewing
• Vehicle Battery Saver
• TFSR/FDSR Rejection Modes
• Security Mode
• Filter Modes
• Ka Max Mode
• VG2
• Radar Signature ID (RSID)
• Laser Signature ID (LSID)
• Adjustable Laser
• Red Light/Speed Camera Detection
• Safety Warning System (SWS)
• Alert Priority
• Integrated Real Voice
• Option Select Mode
• Teach/Tutorial Mode
• POP™ Mode
• Stay Alert™
• Voice Port
• LED Port
• USB Port
• DISP Port

4
TABLE OF CONTENTS
• RADAR1 Port
• RADAR2 Port
• AUX Ports
• Laser Port
• GPS Port
• Setting Saver
Radar/Laser and SWS Alerts ................................ 26 - 27
• Radar Alerts
• Pulse Protection®
• Safety Radar Audio/Visual Alerts
• Laser Audio/Visual Alerts
• Alert Priority
• Reset Features
Troubleshooting Guide......................................... 28 - 29
FCC Information.............................................................29
Are Detectors Legal? ....................................................30
Speed Monitoring Technologies......................... 30 - 33
• POP™Mode
• Laser Facts
• Laser Tips
• Radar Facts
• Other Speed Detection Systems
• Radar Detector Detectors
Warranty Information............................................ 34 - 37
Specifications..................................................................38
Accessories......................................................................39

5
WHISTLER FEATURES
Whistler’s ergonomic and user-friendly design provides a new
level of operating convenience and expandability.
Special features include:
• Voice Module – Provides distinct audio and voice warnings for
X, K, Ka band radar, safety warning system, Compass N, S, E,
W prompts, and laser. This module also adjusts the maximum
audio level.
• Laser-Radar Antenna – Compact, maximum performance
antenna receives laser as well as radar signals. PRO3750
detects the Laser Atlanta Stealth Mode laser gun!
• Control Panel – Provides distinct visual confirmation of signals
detected, signal strength, and indicates engaged modes of
operation. The display can also be mounted 3 different ways
and displayed correctly. Four buttons allow access to the unit’s
features.
• Interface Box (iBox) – Central module provides power and
communication to all modules.
• Alert/Security LED – Provides additional visual notification
of alerts. When selected in Option Select Mode, this LED
doubles as a faux security flashing LED.
NOTE: Specifications and appearance may change without
notice.

6
WHISTLER FEATURES
Voice Module
Control Panel
Laser/Radar Antenna
Temperature
Probe Interface Cable
GPS Module
Front/Rear
Laser Module
Alert/Security LED
Reset Button
Interface Box

7
OPERATION
Power On and Self-Test
Each time your Whistler detector is turned on, an automatic
self-test sequence confirms that the speaker and visual
displays are functional.
• Press PWR or apply Power.
Display shows:
WHISTLER, X-band, K-band, Ka-band, LASER, VG2 OFF, SR
OFF, VOICE ON, POP OFF, XK Filter 1, Ka Filter 1, TFSR ON,
FDSR OFF, HIGHWAY
To turn the unit off:
• Press and release PWR briefly and the display will show a
5-second count down before powering off. If you pressed the
power button by mistake, press the PWR button again during
this 5-second period to cancel power down.
• If the unit is powered by a switched 12 volt source the unit will
turn off when the ignition key is removed.
Memory/Beep Confirmation
All features selected (except Stay Alert and Quiet) are
retained in memory. Each time a button is pressed, one beep
confirms feature “on”, two beeps confirm feature “off”.
Audio Level Adjustment
To change the audio level:
• Move the Volume control on the voice module back to
increase the audio level.
• Move the Volume control on the voice module forward to the
decrease audio level.

8
OPERATION
Auto Quiet Mode
Auto Quiet mode reduces the selected audio level
approximately 5 seconds after a radar or safety radar signal
is detected. The alert for any new signal within 20 seconds
will resume at the lower level. Auto Quiet mode does not
affect laser alerts.
• Press Quiet (before a signal is detected) to engage Auto Quiet
mode.
• Once the Auto Quiet mode is engaged, you may cancel the
audio alarm by pressing Quiet.
• Press Quiet (when the unit is not alarming) to cancel Auto
Quiet mode.
NOTE: Speed selectable Auto Quiet is available with the
RLC-360 GPS module.
Quiet Mode
Quiet mode cancels audio during an alert and any new alert
within 20 seconds. After 20 seconds of no radar signal
detected, the audio alerts are restored.
• Press Quiet to cancel the audio.
• Press Quiet a second time during an alert to restore the
standard audio alert pattern.

9
OPERATION
City/City 1/City 2 Modes
Whistler’s City Modes are designed to reduce the annoyance
of automatic door openers, intrusion alarms and other devices
which share frequencies with police radar. Generally, X band is
used for these devices.
• Press City to cancel Highway Mode and engage City Mode.
• Press City again to enter City 1 Mode.
• Press City again to enter City 2 Mode.
• Press City a fourth time to cancel City 2 Mode and returns the
unit to Highway Mode.
In City Mode, weak speed/safety radar signals give an initial alarm
of two beeps, and then remain quiet until the signal becomes very
strong. When the signal strength increases, two additional beeps
are provided. City 1 and City 2 Modes operate the same as Highway
Mode, but in City 1 Mode, only the X band is lowered. In City 2
Mode, X-band is not detected.
CAUTION: Some towns/small cities may still be using X band
radar. City Modes do not change the audio alert for laser.
Normal Compass/Temp/Volt/Speed

10
OPERATION
Highway Mode
Highway mode provides full audio warnings any time radar (X,
K, Ka, and Safety Radar) or laser signals are detected, and is
recommended for open road driving. For more information on
City and Highway modes, please visit our FAQ page on our
website: www.whistlergroup.com
Selectable Signal Strength Display
There are two settings available in Option Mode that effect how
a received radar signal strength is displayed. The “RMP STD”
(ramp standard) option uses our standard signal progression
from level 1 to 9. The “RMP FST” (ramp fast) option increases the
progression from level 1 to 9. RMP FST increases the response of
the signal strength meter for all bands.
1 = weak signal, 9 = strong signal

11
OPERATION
Understanding the Display
The PRO3750’s display can be set up to show Heading* and
Mode of Operation (Highway and City modes). In-between the
Heading and Mode of Operation one of the following can be
displayed;
Temperature, Voltage or Clock*.
Selecting the Default Feature to be Displayed
Press and hold the Dark button for four seconds or until 2 beeps
are heard. The display will change from Temperature to Voltage.
Pressing and holding the Dark button again for four seconds will
change the display to show the Clock. Repeat and Temperature
is once again selected.
Momentarily Display Features
Press and hold the Dark button for 2 seconds or until 1 beep is
heard and the unit will scroll and display the following for 3
seconds each: Temperature, Voltage, Clock and Vehicle Speed*
and then return to the default feature. Note: When unit is
displaying the vehicle speed the radar antenna is turned off!
Error Messages
Flashing character will be displayed in place of the Heading,
Clock or Speed when the GPS module is acquiring a signal.
Display showing “NO F”, “NO : ”, “NO V” indicates that
Temperature, Clock and Voltmeter have been turned off in
Option Mode.
*Heading, Clock and Speed are available with the RLC-360 GPS
module.
Heading Mode of Operation

12
OPERATION
Temperature Display
The unit can be programmed to display either Fahrenheit or
Celsius. See Option Select Mode.
Display shows:
• Ice Warning Mode: When temperature drops to 32º F.
Display shows:
Unit then gives a unique warning tone. This will happen again if
the temperature rises to 35 degrees or above then falls below
32º.
When either Hi T or Lo T is displayed the limits of the
temperature sensor have been reached.
NOTE: Temperature may rise while vehicle is stopped and idling,
this is normal.
to

13
OPERATION
Dim/Dark Modes
Dim/Dark Mode reduces the illumination of the display.
• Briefly press and release the Dark button to reduce
illumination to a Dim setting.
• Briefly press and release the Dark button a second time
engages Dark Mode. In Dark Mode, the display goes dark for
as long as a signal is being detected and for 20 seconds after,
then the display returns to the dim setting. Dim Modes can be
engaged during an alert.
• Briefly press and release the Dark button a third time to
restore full illumination to the display.

14
OPERATION
Horizontal/Vertical Viewing
The display can be mounted in 3 different ways:
• Horizontally
• Upside Down
• Vertically
Refer to "Option Select Mode" to change display viewing.

15
OPERATION
Vehicle Battery Saver Mode
Vehicle Battery Saver Mode automatically shuts off the
detector if the unit has constant power.
The timer is reset:
1. Each time the detector is turned off.
2. The power cord is disconnected or power is removed to the
unit.
3. Any button is pressed before the timer has expired. The
detector will alert you with an audible and visual warning
before it shuts off. This auto off function can be programmed
for the following: Off, 1, 3, or 6 hours. During this warning
you can reset the timer by pressing any button. If the unit has
automatically turned itself off, press the Power button to turn
the unit back on.
Field Disturbance Sensor Rejection (FDSR)
Traffic Flow Sensor Rejection (TFSR)
Recently many new products that operate on police radar
frequencies have been causing nuisance alerts to radar detectors.
These radar based sensors are installed alongside the Highway
and more recently on vehicles used as lane change assist / blind
spot detectors / collision avoidance systems. TFSR when turned
ON is designed to eliminate alerts from specific Traffic Flow
sensors. FDSR when turned ON is designed to identify all radar
based collision avoidance systems that operate within the same
band as police radar and provide a brief less intrusive alert
to keep you informed and aware. A signal strength indicator
will help determine your proximity to the source without the
continued annoyance of audio.
We suggest you turn FDSR ON if you are experiencing
excessive random false alerts when behind select vehicles.

16
OPERATION
Security Mode
When the unit is powered off by the Vehicle Battery Saver
Mode or by pressing the power button, the Security LED will
begin to flash if the security LED option is turned on. This
simulates a vehicle alarm system.
X/K and Ka Filter Modes
There are times when a radar detector in another vehicle, can
emit a frequency which can cause your detector to falsely alert.
These Filter Modes allow you to select the level needed for your
area to minimize the occurrences of these false alerts. X/K and
Ka Filter Mode factory default settings should provide adequate
filtering for most conditions. If you experience excessive alerts
due to radar detectors in other vehicles, increase the Filter level
for the band received. See Option Selection Mode to change the
filter settings.
NOTE: Speed selectable Filter is available with the GPS module.
Ka Max Mode
Ka Max Mode provides enhanced Ka sensitivity - increased
detection. This mode can be selected with or without RSID. See
Option Select Mode for changing Ka options.
VG-2 Detection Mode
See Option Select Mode to turn this feature on/off. When a VG-2
signal is detected, the VG-2 alert is sounded and the display
flashes “VG-2”. After 3 seconds the audio is canceled and the
display no longer flashes. This cycle is repeated if the VG-2 signal
is detected again.
During the period a VG-2 signal is detected, a radar signal
cannot be detected.
However, because the VG-2 alert has confirmed that a patrol
car is nearby, you are already aware of the potential for speed
monitoring and can adjust your speed accordingly. Laser
detection is not affected while a VG-2 signal is detected.

17
OPERATION
Radar Signature ID (RSID) with Voice Prompts
Identify the difference between the likelihood of a Ka threat vs.
the likelihood of a Ka false from another source (possible radar
detector).
The Ka RSID feature will educate you to the common Ka speed
radar guns by displaying and announcing the nominal police
radar frequencies of 33.8GHz / 34.0GHz / 34.3GHz / 34.7GHz /
35.5GHz. The Ka alerts that do not fall into the common Ka
speed radar windows will be reported only as Ka.
NOTE: This product is not a frequency counter. The unit will
categorize the received Ka signal and select the appropriate
information. Treat every Ka alert with caution.
Laser Signature ID (LSID)
Identify the Laser gun’s pulse rate or PPS (Pulses per Second)
that is transmitted by the speed laser gun. LSID may also be
used to identify other forms of laser sources such as LACC
(Laser Assisted Cruise Control) systems found in some high end
vehicles. If the Laser PPS information displayed is due to
another source such as local airports or LACC, LSID allows you
to Lock Out this rate from giving you the continuous audio alert
during this and any new encounter of the same rate. To lock out
a PPS, press the Quiet button during the Laser alert. This will
place an * on the screen beside the PPS rate and Lock Out this
signature ID. Any new encounter with the same Laser Signature
ID will provide the display information and two quick beeps.
Note: Common Laser PPS rates used in the USA are 100 / 125
/ 130 / 200 / 238 / 380Hz. Currently other Laser PPS rates used
outside the USA include 600Hz.
CAUTION: Do not lock out a PPS rate if it is close to known
speed laser guns.

18
Adjustable Laser Receiver
If these alerts are bothersome, you may wish to turn on the
LSID feature and make note of the PPS rate for these
occurrences.
The laser validation windows are separated into 4 groupings
allowing for customization to eliminate and/or make less
frequent the number of laser alerts from these non police
sources such as airports, laser assisted cruise control systems
and more.
An example of this may be to shorten the first window from
.05-1.0 to .05-.90, the second window can be adjusted from
1.0-2.0 to 1.2-2.0. You now have ignored any laser that has
an average PPS rate between 900Hz and 1200Hz. Validation
will occur from 50Hz to 900Hz, and resume from 1200Hz to
2000Hz.
If laser within a group is not used in your country, you may shut
off that group (change the selection from Y to N while in Option
Select Mode) by pressing the PWR and DARK button at the same
time then releasing.
Red Light/Speed Camera Detection
The PRO3750 is capable of alerting to these locations with the
RLC-360 GPS module and an updatable database.
OPERATION
.05-1.0Y
1 of the 4 Laser Windows
adjustable beginning adjustable ending

19
OPERATION
Safety Warning System™
In communities where transmitters are located, the Safety
Warning System™ displays over 60 text messages. When an SWS
signal is detected the audio alert is Geiger counter-like.
Safety Warning System Text Message
EXAMPLE: Poor - Road - Surface.
NOTE: Not all areas have Safety Warning System™transmitters.
Alert Priority
When two or more signals are received at the same time, the
alert priority is:
1. Laser 2. Speed Radar 3. Safety Warning System™
EXAMPLE: If X band is alerting, then suddenly a laser signal is
detected, the laser warning will override the X band alert.
Integrated Real Voice®
Real Voice®will be used to articulate the following:
1. Band Identification
2. Safety Warning System™categories
NOTE: Voice message may not replicate the text message.
3. Feature Selection
4. GPS Red Light/Speed Camera information
Option Select Mode
Press and hold the Quiet button to enter Option Select Mode.
Upon entering Menu mode, pressing the Quiet button will step
thru in an ascending order while pressing the City button will
step thru in a descending order.

20
OPERATION
Display
Shows
To Change
D=Dark/
P=PWR
To Reset
or
Accept
Groups:
Options
XK FLTR 1 D or P N/A Filter0, Filter1, Filter2, Filter3
(Four Different Filters)
Ka FLTR 1 D or P N/A Filter0, Filter1, Filter2, Filter3
(Four Different Filters)
TEST ON D=OFF P=ON N/A On-X, K, Ka Laser Audio Tones
Off-One Beep during power up
RADAR1 Y D=NO P=YES N/A Radar1 Y or N
RADAR2 N D=NO P=YES N/A Radar2 Y or N
TEMP F D or P N/A Changes temp reading F, C, or No
VOLT YES D=NO P=YES N/A Battery Voltage Yes or No
X-ON D=OFF P=ON N/A X Band On, Off
K-ON D=OFF P=ON N/A K Band On, Off
Ka-NORM D or P N/A Norm, Off, Max, MaxID, RSID
LSR NORM D or P N/A Norm, Off, LSID
.05-1.0 Y D or P Press both
D&P
D=Left Group adj.
P=Right Group adj.
Change Laser detection areas
1.0-2.0 N D or P Press both
D&P
D=Left Group adj.
P=Right Group adj.
Change Laser detection areas
2.6 - 3.0 Y D or P Press both
D&P
D=Left Group adj.
P=Right Group adj.
Change Laser detection areas
3.2 - 4.2 Y D or P Press both
D&P
D=Left Group adj.
P=Right Group adj.
Change Laser detection areas